this , works for all the pals , i have with mopar,s or just street rod,s.I have used this product for years.. I n ohio we use JUSTICE BROS. radiator cool treatment. it works. WHY do you get stuck in traffic in the first place. c300 ron merry 300 to all. ----- Original Message From: Rich Barber To: Chrysler300@xxxxxxxxxxxxxxx Sent: Monday, December 11, 2006 12:44 PM Subject: [Chrysler300] 1955 C-300 cooling Our 1955 C-300 starts getting hot under the collar when stuck in California traffic on hot days. A little research indicated there are two different fans available for 1955 Chryslers--four blade and six blade--both 18". The 6-blade fan was standard on Windsors and fitted to NY's & Imps with a/c. Has any 1955 C-300 driver experimented with swapping out to the six-bladed fan to help keep things cool? Results? Opinions? The Service Manual indicates a/c cars had a box-type shroud and that would seem to be helpful for maximizing air flow at low speeds. Any thoughts on that? There does not appear to be any difference in the water pumps for a/c or non a/c cars, but the a/c cars had a 180 degree thermostat instead of a 160 degree unit--this from the Parts Manual, but not confirmed in the Service Manual. 7# radiator cap on non-a/c cars, 14# on a/c cars. Finally, is there any possibility of a retrofit thermal fan clutch for these bankers' hot rods? Christmas greetings and C-300'ly, Rich Barber Brentwood, CA 1955 C-300 [Non-text portions of this message have been removed]